Jessica Biel's Diet Drives Her "Nutso"

Jessica Biel is famous for her rock-hard body but the A-Team hottie says it doesn’t come easy — it involves constant exercise and a diet she describes as “the worst.”

Jess works out two or three days a week with a personal trainer, but the actress fits in exercise every day. “I used to do a lot of ballet — it’s the most amazing workout,” Jessica tells the UK’s Glamour magazine [via Huffington Post].

She adds: “Every day I do something, whether it’s in the gym, the pool or hiking with my three dogs.”

But she allows herself time out from such unrelenting discipline: “When I’m working and I eat healthily all week, I then give myself one day — usually Sunday — when I just eat what I want. You have to, otherwise your mind goes a little nutso,” she says.

She adds: “I’m not a perfect person who doesn’t mess up, eat bad, not work out — I do all those things.”